SQcomps install

[talnlnky]

hey, here's the thread I told you I'd start...

keep in mind...
these are single 12's on this graph, 750rms

once you put these boxes in a car, you'll have cabin gain in the sub 40hz range... especially in the sub 30hz range.

the group delay matters most above 30hz, once you get below 30hz, it really don't matter

the ported box would have a big long port (see it)... but that would be needed in order to ensure there would be no port noise at high volumes (which would kill your score in the lanes).

[Alien Mantis]

Strange graph readings.

I would expect to see an amplitude peak around 3 db's higher on that ported box line, around the 40-50hz region.

Every single graph I have ever seen, shows a FLAT curve for a sealed box, with a drop-off starting around 50hz, and a slightly higher peak in db just above the tuning frequency for a ported enclosure.

And why would anyone ever want to run a GIANT over-sized SEALED box ???

Why not save space and just do a ported box?

[sqcomp]

No more advice

[talnlnky]

Originally Posted by Alien Mantis

Strange graph readings.

I would expect to see an amplitude peak around 3 db's higher on that ported box line, around the 40-50hz region.

Every single graph I have ever seen, shows a FLAT curve for a sealed box, with a drop-off starting around 50hz, and a slightly higher peak in db just above the tuning frequency for a ported enclosure.

And why would anyone ever want to run a GIANT over-sized SEALED box ???

Why not save space and just do a ported box?

and Infinite Baffle install is pretty much a giant sealed box. To mimic an IB install using a sealed box you only have to have a box 4 times greater than the vas of the sub.

that isn't an amplitude chart per say, it doesn't show how loud it'll be, only how quickly it'll roll off.

the reason why it doesn't look like the ported box is a lot louder is because it is a small size ported box considering how low it is tuned... That is an extremely low tuning for a car.


I'm trying to convince sqcomp to do something a bit more radical, yet easy on his install... I'd like to see dual 15's IB in his trunk.

[Alien Mantis]

Originally Posted by sqcomp

AM -- Save space on that vented enclosure? That single enclosure is almost 3 cubes.

Design #3 is a 5 cf sealed box.

That is what I was referring to.

[_S7V7N_]

Sq you have a Sedan ? .....If so did you remove the 6x9's to get more sound out from the trunk....I have the base model....so my rear seats won't fold down....i'm flirting with the idea of seeing if there's a way to fit the fold down seats in there, with maybe changing a few bolts .

[talnlnky]

Sqcomp, if you start using membranes.... you will lose your 20-40hz octave... at least a good amount of it.

[talnlnky]

Originally Posted by sqcomp

...which I won't...

The only reason I'd use those is if space was the first requirement. I think I can spare 2 cubes sealed for a very stable response. I'm going to be interested to hear what the sound is like with all the deadening treatment, the enclosure build, and the signal quality.

Right now I've got a discussion going on on another board having to do with aiming and speaker placement. It's got some pretty good contributors...all of them have been to USACi, IASCA, and MECA finals; some of them are actually world champions...

I feel that if I don't get on this system as soon as I get home it'll never be right. I'm just anxious to do this!

yeah.... focus on the mids & highs.... subs really aren't that hard to get sounding good.... sealed box, and enough cone area and you are good.

With a ported box, you have to have a awesome box design, or a 1/3 octave eq.

[_S7V7N_]

My bad for hijacking.....i'll delete my post, it was kinda rude.

[_S7V7N_]

What material is that Ensolite made out of ?

[talnlnky]

Originally Posted by sqcomp

ensolite is a lightweight closed cell foam. You can buy it at http://www.raamaudio.com. It is very moldable, moreso than dynaliner. That being said, that 1/2" Dynaliner I'm using on my rear doors is THE $hit. I really have enjoyed both products.

i used ensolite on my yaris... i dunno how much it helped.... easy to use for sure... wish it was twice as thick. I understand how the foams work, but I really wonder which ones actually are worth a darn. Next time I buy a car, I'm just buying 5 gallons of the liquid junk (spectrum) and throwing it all over the floorboards... get it like 1/2" thick, then do the underside of the car with it too.... if that doesn't get rid off all the road noise, I don't know what will... We did that to a friends SUV... and it did wonders... I should've done the same.

[Alien Mantis]

As much as we all love our Yarii,

The Yarii's biggest problem is the fact that it is a unibody car.
It doesn't have a seperate FRAME under it.

All the suspension components attach directly to the body shell.

So, naturally it transmits more road noise.

It is after all..... an ECONOMY CAR.

I do wish that Toyota would have spent a little more effort on sound-dampening.
When you strip the panels off the car, you see how little they did.
I mentioned this when I filled out my "Toyota satisfaction survey".

But after all.... the Yaris is an ECONOMY CAR.

[bzinn 1]

Wow I am glad I opened this thread,I just picked up a IDQ 12" for $50 from a buddy and it looks like it will work well in the small car,keep us posted on the boxs you chose,I need some ideas on what will work still.

[sqcomp]

*

[_S7V7N_]

Dude that spare tire needs to be relocated..Lolll i see lots of potential under there for a nice lil amp rack setup. Imma see if that sucker can be moved to under the car, kinda like how trucks are.

Yo do you think a set of 3.5's with a Mounting depth of 1.5 will fit in them c-pillars ?

[_S7V7N_]

http://4wheeldrive.about.com/od/bedl...herculiner.htm

You think that stuff could be an alternative for the trunk, for us that are on a budget to get some " mass " and deaden the trunk a bit ? Ace hardware has it for 24.99 a gallon.

[derickveliz2]

Originally Posted by sqcomp

See? It's setup for a sound deadening exercise!

Sqcomp is right! I agree %110

I just started this process and every hour I spend it's worth it.

I started to notice the benefits in the early stages, watch video:

YARIS DEADENING VIDEO


I'm only installing a small 10' sub-woofer not a big deal or professional install like you guys, so I'm really looking forward to see how your set ups come alive.




.

[_S7V7N_]

I'm Def no pro, my respect goes to Sq and Taln I'm just learning, Loll as you can see on some of my questions, but it's great to Get opinions from others, I sure am glad there's a group of us now working on Sedans, before the majority of the Posts were on Hatches, The sedans are comming alive !!!

Good luck to You guys on your installs, I'm dying to see what type of creations can come from all this.